https://bugs.freedesktop.org/show_bug.cgi?id=28994
--- Comment #9 from Álmos aaalmosss@gmail.com 2010-12-17 13:21:36 PST --- (In reply to comment #8)
I wonder why the skybox renders correctly only on r5xx...
Maybe you set world detail=low, which removes the clouds (and the visible skybox)...
BTW I found absolutely no docs about how to change the driver to softpipe from r300g. After hours of googling the only clue I found was 'LIBGL_ALWAYS_SOFTWARE=1' in a comment on a phoronix forum.
Create an empty directory, add a swrast_dri.so symlink there that points to swrastg_dri.so or whatever driver you need. Set LIBGL_DRIVERS_PATH for it to contain the path to that directory. Every 3D application will then look for $LIBGL_DRIVERS_PATH/r300_dri.so, which wouldn't be there. Then it will look for $LIBGL_DRIVERS_PATH/swrast_dri.so and load it.
.....
Neat trick. Should be added to a readme or fd.o wiki.